Purpose:The motor and non-motor deficits of Parkinson's disease (PD) can cause daily challenges and have been associated with reduced health-related quality of life (HrQoL). A number of variables have been consistently, though not unequivocally, identified as important in influencing overall HrQoL in individuals with PD, such as demographic factors, cognitive decline, and level of motor impairment. However, the presence and severity of dysarthria is often overlooked, despite the potentially adverse influence on HrQoL. The primary purpose of this study was to understand the predictors of HrQoL, as well as self-perceived communication participation, in individuals with PD who have dysarthria.Methods: Twenty-seven participants with Parkinson's disease and dysarthria completed the study. Linear regression was used to determine the predictive ability of motor function, speech intelligibility and cognitive performance on HrQoL and communicative participation; models were run with and without the demographic/clinical variables of age, sex, years of education, disease duration, and depression scores.Results: HrQoL was significantly predicted by the severity of motor symptoms and the combination of cognitive functioning with age, whereas communicative participation was only predicted by monologue intelligibility.Conclusions: This preliminary study suggests that the HrQoL of individuals with dysarthria from PD may be most affected by overall motor function, while participation in life situations may be most influenced by decreased conversational intelligibility.
ReSeARCh ARtiCleCheck for updates people globally [1] and is considered a complex multidimensional disorder that leads to a broad array of motor and non-motor symptoms [2]. The primary motor characteristics of PD include tremor, rigidity, bradykinesia/akinesia, and postural instability; secondary motor characteristics include dysarthria, dysphagia, and micrographia. Non-motor symptoms emerge from numerous domains, including cognitive, neuropsychiatric, sleep, sensory, and autonomic systems [3], and are present in the majority of people with PD.Both the motor deficits [4,5] and non-motor deficits [6-8] can cause daily challenges and have been associated with reduced quality of life. The motor impairments often lead to decreased physical mobility, which is the most commonly reported problem among people with PD [4,5]. Additionally, motor impairments negatively impact the ability to complete activities of daily living (ADLs) which can lead to a decreased level of independence. Non-motor deficits, particularly cognitive impairment, are commonly observed across the course of PD, with approximately 15%-25% of people presenting with challenges in the early stages of the disease and 50-80% of people demonstrating dementia over the course of the disease [9,10]. The characteristics of cognitive impairment vary by person, but may include a decline in executive function, attention, memory, working memory, and visuospatial functioning [10][11][12][13]. Cognitive deficits in ind...